don't quote me on this, gender skeletal difference are due to bone modelling during adolescence, it's not determined at birth IIRC, It is unkown to me how much remodelling is done during normal adulthood, nor during transition, certainly skeletal changes happen when someone transitions, you may have noticed this yourself, but whether this represents a significant advantage at sports or not is something that you may want to ask a real doctor and not me. i'm too busy making shit up at work to make shit up here.